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Add external flash support and dual-bank flash swap functionality for PSoC6 devices #700

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Add external flash support and dual-bank flash swap functionality for PSoC6 devices #700

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4 changes: 2 additions & 2 deletions config/examples/cypsoc6.config
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ SPI_FLASH?=0
NO_XIP?=0
UART_FLASH?=0
ALLOW_DOWNGRADE?=0
NVM_FLASH_WRITEONCE?=1
NVM_FLASH_WRITEONCE?=0
WOLFBOOT_VERSION?=0
V?=0
SPMATH?=1
Expand All @@ -27,4 +27,4 @@ WOLFBOOT_PARTITION_SIZE?=0x80000
WOLFBOOT_SECTOR_SIZE?=512
WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x10080000
WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x10100000
WOLFBOOT_PARTITION_SWAP_ADDRESS?=10010000
WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x10010000
29 changes: 28 additions & 1 deletion docs/Targets.md
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Expand Up @@ -2377,7 +2377,6 @@ The following configuration has been tested on the PSoC CY8CKIT-62S2-43012:

```
make TARGET=psoc6 \
NVM_FLASH_WRITEONCE=1 \
CYPRESS_PDL=./lib/psoc6pdl \
CYPRESS_TARGET_LIB=./lib/TARGET_CY8CKIT-062S2-43012 \
CYPRESS_CORE_LIB=./lib/core-lib \
Expand All @@ -2394,6 +2393,34 @@ To compile with hardware acceleration disabled, use the option

in your wolfBoot configuration.

#### External Flash Support

PSoC6 supports external QSPI flash for firmware storage. To enable:

```
make TARGET=psoc6 \
EXT_FLASH=1 \
CYPRESS_PDL=./lib/psoc6pdl \
CYPRESS_TARGET_LIB=./lib/TARGET_CY8CKIT-062S2-43012 \
CYPRESS_CORE_LIB=./lib/core-lib \
WOLFBOOT_SECTOR_SIZE=4096
```

External flash uses a temporary sector backup mechanism to handle the larger erase size (for example, 0x40000 bytes for devices like S25FL512S) compared to internal flash rows. The backup sector is automatically managed in external flash beyond the update partition.

#### Dual-Bank Flash Swap

PSoC6 supports hardware-assisted bank swapping for faster and more reliable firmware updates:

```
make TARGET=psoc6 \
DUALBANK_SWAP=1 \
CYPRESS_PDL=./lib/psoc6pdl \
CYPRESS_TARGET_LIB=./lib/TARGET_CY8CKIT-062S2-43012 \
CYPRESS_CORE_LIB=./lib/core-lib \
WOLFBOOT_SECTOR_SIZE=4096
```

#### OpenOCD installation

Compile and install the customized OpenOCD.
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